at org.apache.drill.exec.rpc.AbstractDisposableUserClientConnection.sendResult(AbstractDisposableUserClientConnection.java:85) ~[drill-java-exec-1.12.0.jar:1.12.0]
at org.apache.drill.exec.work.foreman.Foreman$ForemanResult.close(Foreman.java:822) ~[drill-java-exec-1.12.0.jar:1.12.0]
at org.apache.drill.exec.work.foreman.Foreman.moveToState(Foreman.java:896) ~[drill-java-exec-1.12.0.jar:1.12.0]
at org.apache.drill.exec.work.foreman.Foreman.run(Foreman.java:306) ~[drill-java-exec-1.12.0.jar:1.12.0]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1152) ~[?:1.7.0_161]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:622) ~[?:1.7.0_161]
at java.lang.Thread.run(Thread.java:748) [?:1.7.0_161]